高电压技术2017，Vol.43Issue(5)：1664-1669,6.DOI:10.13336/j.1003-6520.hve.20170428036
66kV交流交联聚乙烯电缆线路改为直流运行的直流载流量
DC Ampacity of 66 kV AC XLPE Cable Line Transformed into DC Operation
摘要
Abstract
Transforming the AC cable line into DC operation is one of the effective ways to improve the transmission power of the cable line,and determining the DC ampacity of AC cable has a major significance.Therefore,DC ampacity of the 66 kV AC XLPE cable directly laid in the air is calculated by adopting analytic method and numerical method,and a DC load test is carrried out.Meanwhile the DC ampacity of AC cable is determined by using numerical method,which are directly buried installation and laid in parallel arrangement,and calculating the transmission power of DC operation.The calculating results show that,for the AC cable laid in the air,the data obtained by analytic method and numerical method agree with the experimental result,that is 780 A.The DC ampacity of AC cable directly buried installation is about 710 A.When the operating voltage of DC operation is 57 kV,the transmission power is equal to the original AC system.The research results can verify the applicability of analytic method in calculating the DC ampacity of 66 kV voltage level cable,and also lay the groundwork for the transformation of the 66 kV AC cable line into DC operation.关键词
直流载流量/交流XLPE电缆/增容改造/直流运行/直埋敷设/数值法Key words
DC ampacity/AC XLPE cable/uprating renovation/DC operation/directly buried installation/numerical method引用本文复制引用
刘士利,李宁,蔡国伟,徐晓峰,朱永华,宋卓然,刘岩..66kV交流交联聚乙烯电缆线路改为直流运行的直流载流量[J].高电压技术,2017,43(5):1664-1669,6.基金项目
国家电网公司科技项目(5222JJ14002).Project supported by Science and Technology Project of SGCC(5222JJ14002). （5222JJ14002）
